Widower Malcolm Webster, devastated by the loss of his first wife, slowly begins to rebuild his life with the help of Felicity, a vivacious New Zealander who helps him to find love again. But on their wedding night she feels groggy and for the next year suffers from unexplained blackouts which stop only when she falls pregnant with their son, before resuming after he's born.

This chilling true story tells how Felicity pieces small clues together before finally realising that the death of Webster's first wife in a car crash might not have been an accident. After he disappears and re-surfaces in Scotland Felicity begins a desperate race against time to try and convince Scottish Police her husband is in fact a cold blooded killer already lining up wife number three.